Can planets exist in the habitable zone of 55 Cancri?
نویسندگان
چکیده
منابع مشابه
Hydrogen Greenhouse Planets beyond the Habitable Zone
We show that collision-induced absorption allows molecular hydrogen to act as an incondensible greenhouse gas, and that bars or tens of bars of primordial H2-He mixtures can maintain surface temperatures above the freezing point of water well beyond the “classical” habitable zone defined for CO2 greenhouse atmospheres. Using a 1-D radiative-convective model we find that 40 bars of pure H2 on a ...
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Five planets are known to orbit the star 55 Cancri. The recently-discovered planet f at 0.78 AU (Fischer et al. 2008) is located at the inner edge of a previously-identified stable zone that separates the three close-in planets from planet d at 5.9 AU. Here we map the stability of the orbital space between planets f and d using a suite of n-body integrations that include an additional, yet-to-b...
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We present a new conceptual Earth system model to investigate the long-term co-evolution of geosphere and biosphere from the geological past upto 1.5 billion years into the planet’s future. The model is based on the global carbon cycle as mediated by life and driven by increasing solar luminosity and plate tectonics. As a major result of our investigations we calculate the “terrestrial life cor...
متن کاملVolatile-Rich Earth-Mass Planets in the Habitable Zone
Planets that form beyond the snow line with too little mass to seed rapid gas accretion (. 10 M⊕) should be rich in volatile ices like H2O and NH3. Some of these planets should migrate inward by interacting with a circumstellar disk or with other planets. Such objects can retain their volatiles for billions of years or longer at ∼ 1 AU as their atmospheres undergo slow hydrodynamic escape. Thes...
متن کاملThe Dynamical Architecture and Habitable zones of the Quintuplet Planetary System 55 Cancri
We perform numerical simulations to study the secular orbital evolution and dynamical structure in the quintuplet planetary system 55 Cancri with the self-consistent orbital solutions by Fischer and coworkers (2008). In the simulations, we show that this system can be stable at least for 10 yr. In addition, we extensively investigate the planetary configuration of four outer companions with one...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Japan
سال: 2019
ISSN: 0004-6264,2053-051X
DOI: 10.1093/pasj/psz026